如何在Xamarin Android中更新TabHost指示器
我需要动态更改选项卡指示器。我可以在Java中找到答案,但在Xamarin中找不到。我尝试使用java代码,但没有成功。这是我的密码 布局代码:如何在Xamarin Android中更新TabHost指示器,android,xamarin,android-tabhost,Android,Xamarin,Android Tabhost,我需要动态更改选项卡指示器。我可以在Java中找到答案,但在Xamarin中找不到。我尝试使用java代码,但没有成功。这是我的密码 布局代码: <LinearLayout android:layout_width="match_parent" android:layout_height="fill_parent" android:orientation="vertical" android:id="@+id/llche
<LinearLayout
android:layout_width="match_parent"
android:layout_height="fill_parent"
android:orientation="vertical"
android:id="@+id/llcheckoutmiddle"
android:layout_below="@id/llcheckouttop">
<TabHost
android:minWidth="25px"
android:minHeight="25px"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:id="@+id/tabHostChkOut">
<LinearLayout
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical"
android:id="@+id/linearLayout1">
<TabWidget
android:id="@android:id/tabs"
android:layout_width="match_parent"
android:layout_height="50dp" />
<FrameLayout
android:id="@android:id/tabcontent"
android:layout_width="match_parent"
android:layout_height="match_parent" />
</LinearLayout>
</TabHost>
</LinearLayout>
LocalActivityManager localActMgr = new LocalActivityManager(this, false);
localActMgr.DispatchCreate(bundle);
TabHost tabHost = FindViewById<TabHost>(Resource.Id.tabHostChkOut);
tabHost.Setup(localActMgr);
TabHost.TabSpec tabSpec = null;
Intent intent = new Intent();
intent = new Intent();
intent.SetFlags(ActivityFlags.NewTask);
intent.SetClass(this, typeof(RouteCheckoutExc));
tabSpec = tabHost.NewTabSpec("Exc");
tabSpec.SetContent(intent);
tabSpec.SetIndicator("Exc (" + ExcCount + ")");
tabHost.AddTab(tabSpec);
intent = new Intent();
intent.SetFlags(ActivityFlags.NewTask);
intent.SetClass(this, typeof(RouteCheckoutRed));
tabSpec = tabHost.NewTabSpec("Red");
tabSpec.SetContent(intent);
tabSpec.SetIndicator("Red (" + RedCount + ")");
tabHost.AddTab(tabSpec);
ViewGroup tabInidcator = (ViewGroup)tabHost.TabWidget.GetChildTabViewAt(0);
ImageView img = (ImageView)tabInidcator.GetChildAt(0);
TextView title = (TextView) tabInidcator.GetChildAt(1);
title.Text = "xyz";
活动代码:
<LinearLayout
android:layout_width="match_parent"
android:layout_height="fill_parent"
android:orientation="vertical"
android:id="@+id/llcheckoutmiddle"
android:layout_below="@id/llcheckouttop">
<TabHost
android:minWidth="25px"
android:minHeight="25px"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:id="@+id/tabHostChkOut">
<LinearLayout
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical"
android:id="@+id/linearLayout1">
<TabWidget
android:id="@android:id/tabs"
android:layout_width="match_parent"
android:layout_height="50dp" />
<FrameLayout
android:id="@android:id/tabcontent"
android:layout_width="match_parent"
android:layout_height="match_parent" />
</LinearLayout>
</TabHost>
</LinearLayout>
LocalActivityManager localActMgr = new LocalActivityManager(this, false);
localActMgr.DispatchCreate(bundle);
TabHost tabHost = FindViewById<TabHost>(Resource.Id.tabHostChkOut);
tabHost.Setup(localActMgr);
TabHost.TabSpec tabSpec = null;
Intent intent = new Intent();
intent = new Intent();
intent.SetFlags(ActivityFlags.NewTask);
intent.SetClass(this, typeof(RouteCheckoutExc));
tabSpec = tabHost.NewTabSpec("Exc");
tabSpec.SetContent(intent);
tabSpec.SetIndicator("Exc (" + ExcCount + ")");
tabHost.AddTab(tabSpec);
intent = new Intent();
intent.SetFlags(ActivityFlags.NewTask);
intent.SetClass(this, typeof(RouteCheckoutRed));
tabSpec = tabHost.NewTabSpec("Red");
tabSpec.SetContent(intent);
tabSpec.SetIndicator("Red (" + RedCount + ")");
tabHost.AddTab(tabSpec);
ViewGroup tabInidcator = (ViewGroup)tabHost.TabWidget.GetChildTabViewAt(0);
ImageView img = (ImageView)tabInidcator.GetChildAt(0);
TextView title = (TextView) tabInidcator.GetChildAt(1);
title.Text = "xyz";
LocalActivityManager localActMgr=newlocalactivitymanager(此项为false);
localActMgr.DispatchCreate(bundle);
TabHost TabHost=findviewbyd(Resource.Id.tabHostChkOut);
tabHost.Setup(localActMgr);
TabHost.TabSpec TabSpec=null;
意图=新意图();
intent=新intent();
intent.SetFlags(ActivityFlags.NewTask);
intent.SetClass(这个,typeof(RouteCheckoutExc));
tabSpec=tabHost.NewTabSpec(“Exc”);
tabSpec.SetContent(意图);
tabSpec.SetIndicator(“Exc(“+ExcCount+”);
tabHost.AddTab(tabSpec);
intent=新intent();
intent.SetFlags(ActivityFlags.NewTask);
intent.SetClass(这个,typeof(RouteCheckoutRed));
tabSpec=tabHost.NewTabSpec(“红色”);
tabSpec.SetContent(意图);
tabSpec.SetIndicator(“红色(“+RedCount+”));
tabHost.AddTab(tabSpec);
我尝试了以下java代码。它不起作用
TextView txt = tabHost.GetChildAt(1).FindViewById(<Here I dont know what control I should give since there is no title defined>);
TextView txt=tabHost.GetChildAt(1.FindViewById();
在Xamarin.Android中,它应该是:
TextView txt = tabHost.GetChildAt(0).FindViewById<TextView>(Resource.Id.title);
谢谢你的回答,杰克。但是没有一个适合我。第一行返回对象引用错误,第二行返回null。